Strange IDs

From: James (James@nospam.com)
Date: 12/03/02 

From: "James" <James@nospam.com>
Date: Tue, 3 Dec 2002 13:21:50 -0800

I am running W2K Pro station. When I open the local
computer policy as shown in the attached file, I noticed
that there are 2 SIDs granted the right to logon locally.
Where do these SIDs come from & is it normal for these to
showup as user IDs? How can I get rid of these if that's
doable? Thanks